If Gu Yu wasn't mistaken, these should be top-grade source stones. Even with his peak Emperor Realm cultivation in his previous life, Gu Yu had never obtained a single top-grade source stone. Now, he had suddenly seen three.

A top-grade Originium is equivalent to 100 high-grade Originium. Of course, even if you were to exchange 100 high-grade Originium for a top-grade Originium, the other party would not agree to the exchange. Although the amount of Origin Energy contained in a top-grade Originium is not as much as that in 100 high-grade Originium, and even if the purity of the Origin Energy is not much higher, the top-grade Originium has an incredible effect.

Once the source energy in a high-grade source stone is used up, it will shatter and turn into a pile of useless stones, but this is not the case with top-grade source stones.

Top-grade source stones can automatically absorb the source energy between heaven and earth, and even if the source energy in them is used up, they can slowly recover on their own.

In fact, top-grade Originium can no longer be called Originium; it is a treasure that stores Originium energy.

Imagine if you carried such a thing. When your source energy ran out, you could find a source stone mine, and this thing could absorb source energy on its own. It wouldn't take long for it to be full again. How convenient! It's much more convenient than carrying a bunch of high-grade source stones.

Most importantly, top-grade source stones are the most suitable for providing energy to the array's core, and they can be gradually replenished after being used up.

"Can I take the top-grade source stone?" Gu Yu asked Black Wind Whirlwind.

“Okay.” Hei Fengxuan nodded. “However, you can only take one piece. This thing is extremely rare. Although my Hei family owns a large high-grade source stone mine, it is only possible to produce one piece every ten years.”

"Oh!" Gu Yu was somewhat disappointed upon hearing Black Wind Whirlwind's words. He actually wanted all three, but that idea was indeed somewhat impossible. There were no top-grade source stone mines in this world. Generally, only large source stone mines could condense into a single piece after years of accumulation.

The fact that Black Wind Whirlwind was so willing to give him a piece so readily is actually quite generous.

Black Wind Whirlwind saw the disappointment in Gu Yu's eyes, but this thing was really too rare. He reached out and grabbed a top-grade source stone in an instant. He handed it to Gu Yu, who reached out and grabbed it directly, putting it into his source space.

Gu Yu then selected eight medicinal herbs that would help improve his cultivation level. Of course, he did not choose these eight herbs for himself.

"Your Highness Gu Yu, how long will it take you to recover your cultivation?" At this moment, the group arrived in front of the large source stone mine. The rich source energy made everyone feel refreshed and relaxed after taking a breath.

"Probably one or two months!" Gu Yu said casually. How could he possibly recover his cultivation? He was only at the second level!

“Then we will help Prince Ha Yu recover his cultivation as soon as possible. During this time, I will keep the miners away from the source stone mine center, so you don’t need to worry about others disturbing your cultivation,” Black Wind Whirlwind said.

"Thank you, Your Majesty, thank you, Hei Yi, Hei San. Once I recover my cultivation, I will definitely remember the kindness the Hei family has shown me this time," Gu Yu said, bowing deeply, his voice sincere.

“This is what we should do,” Black Wind Whirlwind said.

The next second, Gu Yu, holding Ri Jiu's waist, flew towards the center of the Originium Mine. At the center of the large, high-grade Originium Mine, the concentration of Originium Qi had already turned into liquid.

As Gu Yu entered, he found himself surrounded by high-grade source stones, countless of them. This source stone mine contained an immeasurable amount of source stones. The Black Bull Kingdom had been mining it for thousands of years, yet the mine remained prosperous, and it would likely thrive for several more thousand years.

"Which of the 36 formations is suitable?" Gu Yu sat cross-legged at this moment, as he was not familiar with all 36 formations.

“Kid, I think it would be good if you could set up an array that could detonate this high-grade source stone mine. If this source stone mine explodes, the entire royal city will be annihilated. For the Black Bull Kingdom, that would be a devastating blow,” Long Yuan said.

“Hehe…” Gu Yu laughed, “Putting everything else aside, if this Originium mine explodes, I’ll turn to ash too.”

It's simply impossible to detonate such a massive Originium mine. Even if it were detonated, the explosive power would be so great that even a demigod at the center would be killed, let alone Gu Yu.

Such a massive high-grade Originium mine would have an explosive power that could destroy the heavens and the earth.

"Boy, in your array book, isn't there a single array that can teleport you?" Long Yuan asked.

"Teleportation array?" Upon hearing Long Yuan's words, Gu Yu was immediately shocked. Indeed, there was a teleportation array in the Book of Arrays called Ten Directions Shift.

This formation can teleport tens of thousands of miles in an instant, but it consumes a huge amount of source stones. Once, it would probably take tens of thousands of high-grade source stones. So Gu Yu had never considered this formation. But now, should he worry about the source stone consumption problem?

“You can first set up a teleportation array, and then set up another array that can detonate this source stone mine. Even if you can’t detonate it completely, detonating a part of it will be enough to give Black Bull Royal City a hard time. Then you can teleport away first, leaving one of your source soldiers here to detonate the array. Wouldn’t that be the best of both worlds?” Long Yuan said.

“What you said makes sense.” Gu Yu nodded after hearing what Long Yuan said. He couldn’t detonate the entire source stone mine, but detonating a part of it was no problem. Even if he blew up a tenth of the royal city, it would cause great chaos in the royal city and inflict a terrible price on the Black Bull Kingdom.

Thinking of this, Gu Yu instantly summoned five Origin Soldiers. As Gu Yu's cultivation level increased again, the combat power of these five Origin Soldiers also increased to the level of two dragons.

As soon as the five black figures appeared, they headed towards the surrounding high-grade source stone mines, their arms transforming into mining tools as they began to dig.

"Rijiu, do you want to go mining during this time?" Gu Yu asked Rijiu, who was sitting to the side and looking him over.

"No." Ri Jiu shook her head.

"These are all high-grade source stones! Don't you need any?" Gu Yu asked.

“I don’t need it,” Ri Jiu said. “But I know you do need it. If you ask me for help, I can help you.”

"Uh!" Gu Yu rolled his eyes. To be honest, he did need Ri Jiu's help. The two formations, especially the teleportation formation, were very difficult to set up, but he couldn't ask Ri Jiu for help.

Yuanbing is still the best! He's completely obedient to me.

"Alright, I'll stop teasing you. Since you had a chance to escape on your own, but you didn't run away for my sake, I'll kindly help you." After saying that, Ri Jiu also started mining.

The central area of ​​a high-grade Originium mine is actually not mined because it is suitable for cultivation, especially for strong individuals breaking through to a higher realm.

The so-called mining is just mining the outer perimeter of Originium mines, because the Originium in those places may be attached to rocks or soil, and needs to be extracted from them, and may even need to be refined.

"Father, the allied forces of the seven kings will arrive at Niuhua City the day after tomorrow and begin their siege." At this moment, Hei Yi and Hei Fengxuan were standing in a large hall, and Hei Yi said to Hei Fengxuan.

"Hopefully we can win this gamble, and that the true human god is indeed restrained and unable to act," Black Wind Whirlwind said with a grave expression.

"Father, I don't understand. Does a genius from the Ha family deserve such treatment?" Hei Yi suddenly said at this moment. Entering the center of a high-grade source stone mine to cultivate is a privilege that even he, the crown prince of the Black Bull Royal City, does not receive.

“Extraordinary times call for extraordinary measures,” Hei Fengxuan said, giving Hei Yi a meaningful look. “Do you know why, even though I’ve named you Crown Prince, I’m still hesitant to pass the throne to you?”

"Because of the third brother?" Hei Yi looked at Hei Fengxuan, his eyes showing some displeasure.

“No, it’s because you’re not smart enough,” Black Wind Whirlwind said. “A king doesn’t actually need great talent, but he does need wisdom. This vast kingdom needs you to lead it. Every decision you make can affect the fate of the kingdom. Do you think I’m spending so much money to win over Ha Yu? I’m winning over the Ha family, and also protecting my Black family.”

"Protect the Hei family?" Hei Yi frowned; he clearly didn't understand.

"Of the six kingdoms, only my Black Bull Kingdom is fighting against humanity now. It seems the Barbarian Bull Kingdom is supporting us, but do you know? In the eyes of the Barbarian Bull Kingdom, we are merely a weapon, a weapon for them to charge into battle. If we are useful, we can exist; if we are useless, they can discard us. But we have no choice. On one hand, we cannot disobey the Barbarian Bull Kingdom's orders; on the other hand, we cannot compromise. Once we compromise, our cities will be lost one after another," Black Wind Whirlwind said. "Therefore, the Black Bull Kingdom has no choice but to fight. If the Seven Kings' allied forces are defeated, it will be alright; but if they win, my Black family may cease to exist."

"Father, I don't understand?" Hei Yi asked, his face full of confusion.

“You don’t see this as clearly as your third brother, which is why I can’t entrust the kingdom to you. Humanity has a true god in charge. Even if that true god is truly restrained, what will happen to us if he is pushed too far and attacks us recklessly?” Black Wind Whirlwind said patiently.

“We will be wiped out.” Hei Yi’s expression changed instantly. “But we have the Savage Bull Kingdom behind us!”

"Heh..." Black Wind Whirlwind chuckled coldly, "The Barbarian Bull Kingdom is incredibly powerful, but can they withstand the wrath of a true god?"

Seeing Hei Yi's puzzled expression, Hei Fengxuan's eyes showed a hint of helplessness.

"The answer is no. If something goes wrong, my Hei family and even the Black Bull Kingdom will be pushed out by them to appease the true god's anger. We are just pawns, pawns to test the true god of humanity," Hei Fengxuan said.

"Then why don't we refuse?" Hei Yi asked, puzzled. If that's the case, why agree?

"Refuse?" Hei Fengxuan looked at Hei Yi with even greater disappointment. "Do you think my Hei family can become the kings of this Black Bull Kingdom because of your grandfather? It's because of the support of the barbarian tribe."

"Huh?" Hei Yi was stunned. He had always thought that his family was able to become the kings of the Black Bull Kingdom because his grandfather had the cultivation level of the late Emperor Realm. Now that Hei Fengxuan told him that was not the case, he found it hard to accept.

“That’s the truth. In the eyes of ordinary people, the Hei family, the rulers of the Black Bull Kingdom, are very powerful. But do you know what? In the eyes of the Barbarians, they are nothing. They can replace us at any time if they are unhappy tomorrow. Even annihilating us would be easy for them. We are just puppets.” Hei Fengxuan said with a somewhat gloomy expression.

“Our Hei family has three members at the Emperor Realm.” Hei Yi said stubbornly, unable to accept this.

“Three Emperor Realm experts, heh heh…” Hearing Hei Yi’s words, Hei Fengxuan sneered, “Three Emperor Realm experts are nothing more than easy targets in the eyes of a demigod.”

"Father, is there really no one who can restrain Man Jun?" Hei Yi asked.

“Yes.” Black Wind Whirlwind nodded. “That’s the Ha family, Ha the Blade Emperor.”

"Huh?" Hei Yi was taken aback again. "Father, wasn't Ha Dao Huang only at the peak of the Emperor Realm?"

“Yes! Ha Daohuang is only at the peak of the Emperor Realm, but the Ha family’s combat strength is inherently powerful. Moreover, the Ha family has the support of the third family, the Shui family. With the two families joining forces, they have the confidence to contend with the Barbarians. Of the six kingdoms, three kingdoms support the Ha family. Once war breaks out, even if the Barbarians win, they will be severely weakened, which is not the result the Barbarians want.” Hei Fengxuan explained, “Therefore, if the Hei family wants to survive, they need to be on good terms with the Ha family. Of course, it’s not absolute, but we always need to leave ourselves a way out.”

"I see." Hei Yi suddenly realized.

"Alas! The Minotaur race is already in turmoil. Right now, many royal families are watching this war closely. If we lose, my Hei family will be suppressed from all sides. If we win, and the human true god doesn't intervene, my Hei family will still firmly hold the Black Bull Kingdom, and may even gain more favor from the barbarians. But if that true god makes a move, my Hei family may have to abandon the city, abandon the Black Bull Kingdom, and flee." Hei Fengxuan sighed and said, "Hei Yi, whether you are a king or a person, you must remember to be fully prepared, think about all the consequences, and make all the necessary countermeasures."

“Father, I understand,” Hei Yi said, bowing.

In Tu Niu City, the faces of the high-ranking officials were solemn.

"According to reports from our scouts, the Seven Kings' Allied Forces are expected to be at the city gates by dawn the day after tomorrow. Leading them are seven peak-level Kings, and there are seventeen more Kings, making a total of twenty-four. I'm afraid we won't be able to hold Tu Niu City," Qi Jin said. Twenty-four Kings—what does that mean? They only have three Kings on their side. Although Long Aotian is already a quasi-Emperor, how many peak-level Kings could he possibly handle? And if they're called peak-level Kings, does that mean they might actually possess Emperor-level combat power like Long Aotian?

“Twenty-four King Realm experts.” Hearing Qi Jin’s words, Long Aotian’s brows furrowed. “We have to defend it even if we can’t. We must live and die with this Tu Niu City.”

“That’s right, we swear to live and die with Tu Niu City.” Duan Bo stood up at this moment, and as he stood up, several other peak Marquis level members of the Dragon Clan also stood up and said in unison.

"The weapons have been delivered, but as for reinforcements, they probably won't arrive before dawn the day after tomorrow," Qi Jin continued.

“I have already asked my teacher for help. The Crimson Dragon should arrive the day after tomorrow, and some families and sects have also sent several King Realm experts,” Long Aotian said.

"Red Dragon?" Upon hearing Long Aotian's words, the solemn expressions on everyone's faces suddenly softened somewhat.

Chi Long is Qing Long's first disciple and currently the strongest member of the Dragon Group besides Qing Long. In a one-on-one fight, he might not be as strong as Long Aotian, but he is extremely skilled at fighting multiple opponents. As for how he manages to do so, no one knows.

“Lu Yao, the patriarch of the Lu family, will come to assist in the battle tomorrow. His cultivation level is also at the peak of the King Realm,” Duan Bo said.

"Where is the Jiang family?" Long Aotian asked Duan Bo.

“I’ve already sent him a message, but the reply is that Jiang Hai is in seclusion and can’t come. Jiang Ze is dead,” Duan Bo replied.

"Jiang Ze is dead?" Long Aotian frowned, but then relaxed. "After I drive out the Seven Kings' Alliance this time, it seems I'll have to make a trip to the Jiang family."

"Minister, there's one more thing. Should we evacuate the Dragon Division's trainees?" Duan Bo asked. The Kunlun Origin Sect's qualifying competition was unable to continue due to the arrival of the Seven Kings' Alliance.

"No need," Long Aotian replied without hesitation.

“Minister, what if we can’t hold on? They…” Upon hearing Long Aotian’s words, Qi Jin immediately said, “Those are the pillars of China’s future!”

"Notify those families and ask them to come to our aid. If they don't come, tell them directly that I cannot guarantee the safety of those students," Long Aotian said.

"Isn't that inappropriate?" Qi Jin and Duan Bo exchanged a glance after hearing Long Aotian's words and immediately said.

“There’s nothing wrong with it. Don’t they all think it’s none of their business and they should stay out of it? Let them worry about it too. If they don’t care about those people’s safety, then they don’t need to come to their aid. I didn’t force them,” Long Aotian said.

"Uh!" Qi Jin and Duan Bo exchanged glances again. Isn't this a form of coercion? You've put someone else's genius here as a hostage.

However, upon closer reflection, they felt that Long Aotian was right; some people really did need to be pushed like that.

"Keep a close eye on the movements of the Seven Kings' Alliance at all times," Long Aotian said.

"Yes!" everyone immediately replied.

"If I hadn't been unable to suppress my cultivation, even if you were all twenty-four King Realm experts, I would have made sure you suffered greatly." A murderous intent appeared in Long Aotian's eyes.

At this moment, Gu Yu, who was in the high-grade source stone mine, was on high alert, placing source stones one by one in all directions in the mine.

He didn't have the array to detonate the Originium ore, but it was still possible to self-destruct the array and then detonate the Originium ore.

To save time and for convenience, Gu Yu set up the Six Harmonies Demon-Suppressing Formation, as he was most familiar with this formation.

As for the teleportation array's ability to move in all directions, Gu Yu was not familiar with it and was still studying it.

"It's a pity about this Originium mine. If we could bring it back to Earth, humanity wouldn't have to worry about Originium anymore," Gu Yu said, looking at the high-grade Originium mine.

His strength is weak. If he were a god, he could move more than half of the source stone mine, even if he couldn't take the entire mine with him.

With a sigh, Gu Yu took out the piece of black gold refined gold.

"You said there's a way to melt it, how?" Gu Yu asked Long Yuan.

“By condensing divine power into flames, it can naturally melt them,” Long Yuan replied.